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Author Topic: Resolution for good guiding/tracking  (Read 988 times)

pterodyne

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Resolution for good guiding/tracking
« on: August 16, 2017, 23:27:28 »

I've pulled out a back burner project of converting a celestron CG5 mount. I have everything working fine, but with my NEMA 17 1.8 degree stepper I get a resolution of .703 Arcsec/step. Is this sufficient for autoguiding and good tracking?  I have some .9 degree steppers but I had some problems with grinding which seemed like them being underpowered.  The 1.8 degree drive the mount around great so I'd like to keep em in place.

Ive attached my config as a PNG

Thanks for looking!
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TCWORLD

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Re: Resolution for good guiding/tracking
« Reply #1 on: August 17, 2017, 08:01:58 »

Hi,

Anything sub-arcsecond should give you reasonable results, though higher res (smaller number) is better as you will get smoother movement because the motors can only be moved a step at a time. In this case your mount will be moving .7 arcsec each step, will pause for a short period, then move another .7 arcsec.

Unless you are going really high magnification, you will probably find tracking and guiding will be acceptable.

Tom.
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Tom Carpenter (AstroEQ)